Throw-off mechanism



Aug. 17,1926. Y 1,596,728

J. J. HALLIWELL THROW-OFF MECHANI SM Filed Jan, 5, 1923 2 Sheets-Sheet 1M w E Aug. 17 1926.

1,596,728 J. J. HALLIWELL THROW-OFF MEGHANISM Filed Jan. 5, 1923 2Sheets-Sheet 2 v. l

. amig i N I '-Q Patented Ang. l?, 1926..

S TA T E L YORK.

Application led January 5 provide a throw-0H mechanism for one oll thecylinders of a printing couple by which the cylinder may be tripped orthrown on or ott impression and in which a further movement may be giventhe throw-olf mechanism to adjust the impression contact of thecylinderswhile the cylinders are in impression contact.

It is a further object of the invention to provide an improved togglefor effecting the throw-off to and from impression and for adjusting theimpression while the cylinders are in impression contact.

Generally speaking, the improved mechanism includes an eccentric bearingfor the cylinder of the printing couple which is to be moved to or awayfrom its cooperatingr cylinder, this eccentric bearing being actuated tothrow on or off impression and then given a further movement to adjustthe impression after the cylinders have been brought into printingrelation, this movement being effected by a toggle of improvedconstruction which is capable of being given an adjusting movement afterit has been operated to throw the cylinders on impression and while itis locked in such position.

With these and other objects not specilically referred to in view theinvention consists in certain novel parts, arrangements and combinationswhich will be described in detail in' connection with the accompanyingdrawings and the novel features thereof pointed out in the claimshereunto annexed.

In these drawings- Figure l is a side view of so much of a printingmachine as is necessary for understanding the invention, certain partsbeing shown in section and certain other parts being broken away, theprinting elements being illustrated as on impression.

Figure 2 is a similar view with shown in 0R position;

Figure 3 is an end view partly in section on the line 3 3 of Fig. l,looking in the direction of arrow a of that figure;

, Figure 4 is a detail sectional view looking in thedirection of arrowb, the view being taken on line 4 4 of Fig. l; and,

Figure 5 is a detail sectional view on an the part PATENT JOHN J.HALLIWELL, OF TUCKAHOE, NEW YORK,

` MENTS, TO R. HOE AND CO., INC., OF NEV YORK,

ASSIGNOR, BY MESNE ASSIGN N. Y., A CORPORATION 0F NEW THROW-OFF MECHANISM.

inders are tripped away from the impression cylinder. It will beunderstood, however,

that the invention is susceptible of use in other arrangements ofprinting couples than that here illustrated and that such other use iswithin the scope of the invention.

In the particular machine illustrated the operative partsof themechanism are carried in side frames 1 of any usual or desiredconstruction. Mounted in these side frames is an impression cylinder 2supported in bearings 3 these bearings being stationarily mounted in theframes so that, in the con- .struction illustrated, the impression isstationary. Cooperating with this impression cylinder is a pair of formcylinders 4, 5, and, as shown, these form cylinders are arranged to betripped or thrown .on or oli impression relatively to the impressioncylinder 2. These form cylinders are supplied with ink from distributors6, to .which ink is supplied in any suitable manner, not illustrated,and the usual train of ink rolls 7, 8. In constructions where the formcylinders are tripped, as in the present instance, the inking mechanismis mounted so that it can be moved towardnand away from the formcylinders, and, in the particular construction illustrated, this iseiected by the provision of a movable frame 9 in which the distributorsand ink rolls are mounted, this frame being racked back from the formcylinders in any usual manner, not illustrated. rlie bolts 10 may beemployed if desired for uniting the movable frame 9 with the main frame1 of the machine.

rlhrow-otl mechanisms embodying the invention will include an eccentricbearing for does away withl the floating journal boxes' and the likeusually employed in this class of machines and the various mechanismsfor adjusting these floating boxes. Thus there is provided a very simpleand eicient construction which malres the production of the mechanismexceedingly economical.

In machines constructed in accordance with the invention, therefore, thecylinders 4, 5 will be eccentrically mounted, and, in the particularconstruction illustrated, the shafts 12 are provided with reduced ends13 mounted in sleeves 14 in eccentric hubs 15 rotatably mounted in sideframes 1 before referred to.

By rocking the hubs 15, therefore, the cylinders are given an eccentricmovement to and from the impression cylinder so that they may move tothrow the cylinder on and ofi' impression and a further movement willcause an adjustment of the impression.

Machines constructed in accordance with the invention will include atoggle mechanism for moving the cylinders to and from impression andmeans will be provided whereby this toggle mechanism may be adjustedafter the parts are in printing relation so as to adjust the impressionas may be necessary or desired. While this toggle mechanism may bevaried to some extent, in the construction illustrated, bearing 15 isprovided with Aa rocker arm 16 to which one arm of the toggle isconnected at 17. lVhile' the mechanism for adjusting the toggle togive-an adjusting movement to the arm 16 may be varied, in theparticular construction illustrated, thc toggle is arranged so that oneof the toggle arms may be adjusted. As shown the toggle arm 18, which isconnected to thc roc (er arm 16, is a split arm having members 19 and20. These members are, as illustrated, (see dotted lines in Fig. 1)recessed as indicated at 21 and are connected by a threaded bolt 22,lock nuts 23 being rovided for preventing rotation of the olt. On thebolt is provided an adjusting nut 24 this nut being locked between thelock nuts 22 and being provided with holes .25 in which a suitable toolmay be inserted for turning the nut. By rotating this nut the splitparts of the arm are drawn toward or forced away from each otherthuscausing a rocking movement of the rocker arm 16 and an adjustment of theimpression contact between the form and impression cylinders while thecylinders are in printing relation. .The toggle arm 18 at the endopposite the 'rocker arm 16 is connected to the other toggle arm 26 faston a rockI shaft 27 suitably journaled in the machine frame and thisshaftpbeing rocked to make and break the toggle by an operating handle28.

The locking means for toggle may be somewhat varied in construction butin ma- `struction the arm 30 ma chines embod ing the invention in itsbest form this loc ing means will be adjustable so that the throw of thetoggle may be varied so as to vary the extent of the movement given therocker arm 16. In the particular construction illustrated this lockingmechanism includes an arm 30 fast on rock shaft 27 before referred to,this arm 30 being provided with a head 31 having a holding slot 32, thisholding slot being capacitated to take over a stud 33 on a hand clamp 34by which the arm may be securely clamped to the main side frame 1 beforereferred to.

As before stated, in the best constructions this loeking means isadjustable so that the position of the vhead 31 may be varied in theframe. While this mechanism may vary to some extent, in the particularconstruction illustrated (see particularly the lower portion of Fig. 2and Fig. 5), the frame 1 may be recessed as indicated at 36 the sides ofwhich recess are provided with guides 37 in which can slide a. block 38this block being movable in the guides by means ofan adjusting screw 39having a head 40 provided with holes 41 in which a suitable tool may beinserted to turn the bolt. This block is recessed lto receive a pin 42integrally formed on an arm 43 into which is threaded the end of thehand clamp 34 before referred to. With this conbe locked in differentpositions in the rame relatively to the rock shaft 27 and the amount ofthrow given by the toggle may be varied accordingly.

While the invention is shown and described in what is believed to be itsbest form it will be understood that various changes may be made in thespecic struc- ,ture disclosed and that the invention is not limited tothis but that such changes may be made without de artin from theinvention as defined in t e clalms hereunto appended.

What I claim is:

1. The combination with an impression cylinder of a form cylinder, aneccentric bearing Ifor one of the cylinders,I a toggle for rocking theeccentric bearing to throw the cylinders on or ofl' impressiommeans forlocking the toggle, means for adjusting the lock, and means foreffecting a movement of the bearing when the cylinders are on impressionto adjust the impression contact.

2. The combination with an impression cylinder of a formcylinder, aneccentric bearing for one `of the cylinders, a tog le for moving thebearing, a lookin arm or the toggle, and an adjustable loe for the arm.

lockirrg1 3. e eomblnation wlth an impresslonV moving the bearing, alocking arm for the toggle, a pin, a block in whlch the pin is mounted,means for adjusting the block, and means forufrsecuring the locking armto the pm.

4. The combination with an impression cylinder of a form cylinder, aneccentric bearing' fory one of the cylinders, a toggle for moving thebearing having a toggle arm, ,adjusting devices for adjusting the arm, alocking arm ,for the toggle, a lock for the\arm, and means for adjustingthe lock.

5. In a throw-'off toggle having a split arm the parts of, which'justing the locking arm,

operable crank for actuating the toggle.

mechanism for printing are connected by an adjusting nut and bolt,

a locking arm for the toggle, means for adand a manually 6. In athrow-off mechanism for printing cylinders, a. movable cylinderwbearing,a toggle having an opera-ting arm, connections betvveen the arm and thebearing, means for locking the toggle, means for adjusting the operatingarm when the toggle is locked, and a manually opera-ble crank forVactuating the toggle. A

In testimony, whereof, vI have hereunto set my hand.

\ 'JoHN J. HALLIWELL.

